Download or read book First row Transition Metal Complexes for Electrochemical Carbon Dioxide Activation written by Niklas Werner Kinzel and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Chemistry of Transition Metal Complexes Related to Solar Energy Storage written by Changhoon Lee (Ph. D.) and published by . This book was released on 2011 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt: The studies in this thesis have focused on the chemistry of transition metal complexes related to solar energy storage: electrochemical H2 production, HX splitting and CO2 activation mediated by transition metal complexes. Transition metal complexes, for example with macrocyclic ligands, can catalyze electrochemical proton reduction, a half reaction of water splitting to H2/O2 by electricity generated by sunlight. The strategy for designing efficient molecular catalysts were explored by introducing a Hangman scaffold into metallomacrocyles. The study exhibits synthesis and electrochemistry of metallomacrocyles, and an example of Hangman effect for electrochemical H2 production. Thermodynamically demanding HX splitting to H2/X2 by sunlight can be a promising method for solar energy storage. To date, most HX splitting chemistry was studied with metal complexes based on 2"d or 3 rd row transition metals. Hence, the usage of cheaper first row metals is an imperative to discover economically viable catalytic systems. HX chemistry of Ni complexes and photoelimination of H2 from Ni hydride complexes, and photoactivation of Ni-Cl bonds were studied. CO2 can be utilized as a carrier of H2 by the syntheses of liquid fuels from CO2 and H2. The challenge of using CO2 as a precursor for organic molecules is the activation of strong O=CO bonds. The reaction with metal complexes is one of the methods to break or weaken the bonds. The CO2 chemistry of Ni complexes was explored, and generation of a new binding mode of CO2 and activation of CO2 to CO were studied.
Download or read book Structural and Electronic Studies of Complexes Relevant to the Electrocatalyic Reduction of Carbon Dioxide written by Eric Edward Benson and published by . This book was released on 2012 with total page 346 pages. Available in PDF, EPUB and Kindle. Book excerpt: Herein we report the synthesis and characterization of transition metal complexes with modified 2,2'-bipyridines. Bipyridines with different substitutions at the 4,4' and 6,6' position were synthesized and their complexes with several transition metals were investigated to elucidate the electronics and steric requirements for the electrochemical reduction of CO2 to CO. The synthesis of tripbipy (6,6'-(2,4,6-triisopropylphenyl)-2,2'-bipyridine), a new substituted bipyridine ligand, and the syntheses, structures, and magnetic properties of the first coordination compounds based on this ligand are described. Reported here are the tripbipy complexes of five late first row transition metal chlorides (MCl2; M = Fe, Co, Ni, Cu, Zn). All MCl2tripbipy complexes are four coordinate and contain a distorted tetrahedral metal center. The synthesis and X-ray crystallographic characterization of several reduced complexes from the chemical reduction of Re(tripbipy)(CO)3Cl are reported. The one-electron reduction of this complex results in the loss of the halide to form the neutral 5-coordinate complex. The two-electron reduction of the starting material with KC results in the loss of the halide, and reduction of the bipyridine ligand. Bond alternation can be seen in the XRD as well as the DFT calculations using ADF 2007.1. We report a series of complexes synthesized from the chemical reduction of the fac-tricarbonyl complex Re(bpy)(CO)3Cl. Reduction of the parent complex with one equivalent of KC results in the formation of the dimer [Re(bpy)(CO)3]2. The one-electron reduction of this dimer does not result in cleavage of the metal-metal bond, but leads to the formation of the anionic dimer [Re(bpy)(CO3]2−. The reduction of the parent compound with 2.1 equivalents of KC8 results in the formation of the anionic species Re(bpy)(CO)3−, which has long been postulated as the active species that reacts with carbon dioxide in the electrochemical reduction of CO2 to CO. Modification of the 6,6' position of 2,2'-bipyridine for the addition of proton relays to the electrocatalyst Re(bipy)(CO)3Cl is reported. Synthesis and electrochemistry of Re(bipy-CH2OH)(CO)3Cl and Re(6,6'-dmb)(CO3Cl (6,6'-dmb = 6,6'-dimethyl-2,2'-bipyridine) are reported. Addition of substituents at the 6,6' position inhibits catalysis when compared to the complexes with the functional groups at the 4,4' position.
Download or read book Modern Carbonylation Methods written by László Kollár and published by John Wiley & Sons. This book was released on 2008-06-25 with total page 383 pages. Available in PDF, EPUB and Kindle. Book excerpt: Comprehensively covering modern carbonylation chemistry, this book is an indispensable companion for all synthetic chemists working in industry and academia. This monograph contains everything there is to know from recent advances in the investigation of carbonylation catalysts, via coordination chemistry to the synthetic application of transition metal catalyzed carbonylations.
Download or read book First row Transition Metal Coordination Compounds for the Electrocatalytic Generation of Hydrogen from Organic and Aqueous Solutions written by Patrick M. Crossland and published by . This book was released on 2015 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt: The development of stable proton reduction catalysts is imperative due to their importance as a source of a carbon-neutral fuel. A cobalt-salen complex with electron withdrawing groups was synthesized. This complex generated protons from organic solutions at a 190 mV overpotential with a kobs of 42000 M-2s-1, and a corresponding turnover frequency of 420 s-1. This is one of the lowest overpotentials reported for a cobalt proton reduction catalyst. While insoluble in water, an experiment where water was added to an electrochemical cell showed a 20% increase in catalytic activity. This indicates that cobalt-salen complexes could be highly active in aqueous solutions. Developing first row transition metal complexes for electro- and photocatalytic hydrogen evolution is of great interest. A photocatalyst for proton reduction could be incorporated into an artificial photosynthesis device to generate hydrogen gas as a solar fuel. Nickel was complexed with the H3ttfasbz ligand, which is known to be redox active.35 In order to assess its catalytic ability electrochemical tests, including proton concentration experiments, and catalyst concentration experiments were performed. These tests showed the nickel complex to be highly active for hydrogen reduction at a cathodic potential (-1.37 V vs. SCE). Due to the high overpotential of this complex, it was integrated into a photocatalytic system with fluorescein as a chromophore.
Download or read book Bio inspired First row Transition Metal Complexes for Small Molecule Activation written by Yun Ji Park and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Cleavage of Carbon Carbon Single Bonds by Transition Metals written by Masahiro Murakami and published by John Wiley & Sons. This book was released on 2015-12-21 with total page 292 pages. Available in PDF, EPUB and Kindle. Book excerpt: Edited by leading experts and pioneers in the field, this is the first up-to-date book on this hot topic. The authors provide synthetic chemists with different methods to activate carbon-carbon sigma bonds in organic molecules promoted by transition metal complexes. They explain the basic principles and strategies for carbon-carbon bond cleavage and highlight recently developed synthetic protocols based on this methodology. In so doing, they cover cleavage of C-C bonds in strained molecules, reactions involving elimination of carbon dioxide and ketones, reactions via retroallylation, and cleavage of C-C bonds of ketones and nitriles. The result is an excellent information source for researchers in academia and industry working in the field of synthetic organic chemistry, while equally serving as supplementary reading for advanced courses in organometallic chemistry and catalysis.
Download or read book Activation of Small Molecules written by William B. Tolman and published by John Wiley & Sons. This book was released on 2006-12-13 with total page 382 pages. Available in PDF, EPUB and Kindle. Book excerpt: The first to combine both the bioinorganic and the organometallic view, this handbook provides all the necessary knowledge in one convenient volume. Alongside a look at CO2 and N2 reduction, the authors discuss O2, NO and N2O binding and reduction, activation of H2 and the oxidation catalysis of O2. Edited by the highly renowned William Tolman, who has won several awards for his research in the field.
Download or read book Pincer Compounds written by David Morales-Morales and published by Elsevier. This book was released on 2018-04-11 with total page 756 pages. Available in PDF, EPUB and Kindle. Book excerpt: Pincer Compounds: Chemistry and Applications offers valuable state-of-the-art coverage highlighting highly active areas of research—from mechanistic work to synthesis and characterization. The book focuses on small molecule activation chemistry (particularly H2 and hydrogenation), earth abundant metals (such as Fe), actinides, carbene-pincers, chiral catalysis, and alternative solvent usage. The book covers the current state of the field, featuring chapters from renowned contributors, covering four continents and ranging from still-active pioneers to new names emerging as creative strong contributors to this fascinating and promising area. Over a decade since the publication of Morales-Morales and Jensen's The Chemistry of Pincer Compounds (Elsevier 2007), research in this unique area has flourished, finding a plethora of applications in almost every single branch of chemistry—from their traditional application as very robust and active catalysts all the way to potential biological and pharmaceutical applications. - Describes the chemistry and applications of this important class of organometallic and coordination compounds - Includes contributions from global leaders in the field, featuring pioneers in the area as well as emerging experts conducting exciting research on pincer complexes - Highlights areas of promising and active research, including small molecule activation, earth abundant metals, and actinide chemistry
Download or read book Electrochemical Studies of the Reaction of Carbon Dioxide with Transition Metal Complexes in Non aqueous Electrolyte written by Dorothea Ann Durand and published by . This book was released on 1989 with total page 382 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Carbon Dioxide as Chemical Feedstock written by Michele Aresta and published by John Wiley & Sons. This book was released on 2010-01-26 with total page 414 pages. Available in PDF, EPUB and Kindle. Book excerpt: Filling the need for an up-to-date handbook, this ready reference closely investigates the use of CO2 for ureas, enzymes, carbamates, and isocyanates, as well as its use as a solvent, in electrochemistry, biomass utilization and much more. Edited by an internationally renowned and experienced researcher, this is a comprehensive source for every synthetic chemist in academia and industry.
Download or read book Celebrating the Work of Prof Sourav Pal Computational Approaches in Catalysis written by Soumyajit Roy and published by Frontiers Media SA. This book was released on 2022-05-25 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Immobilized Catalysts written by Andreas Kirschning and published by Springer Science & Business Media. This book was released on 2004-11-22 with total page 354 pages. Available in PDF, EPUB and Kindle. Book excerpt: R. Haag, S. Roller: Polymeric Supports for the Immobilisation of Catalysts .- J. Horn, F. Michalek, C.C. Tzschucke, W. Bannwarth: Non-Covalently Solid-Phase Bound Catalysts for Organic Synthesis .- Y. Uozumi: Recent Progress in Polymeric Palladium Catalysts for Organic Synthesis .- D.E. Bergbreiter, J. Li: Applications of Catalysts on Soluble Supports .- B. Desai, C.O. Kappe: Microwave-Assisted Synthesis Involving Immobilized Catalysts .- A. Kirschning, G. Jas: Applications of Immobilized Catalysts in Continuous Flow Processes .- N. End, K.-U. Schöning: Immobilized Catalysts in Industrial Research and Application .- N. End, K.-U. Schöning: Immobilized Biocatalysts in Industrial Research and Production
Download or read book Activation of Carbon Dioxide by Pincer Supported Transition Metal Complexes written by Timothy J. Schmeier and published by . This book was released on 2013 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Second row Transition metal Complexes Relevant to CO2 written by Takashi Ono and published by . This book was released on 2014 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis has been focused on the synthesis and characterization of a series of new mono- and dinuclear ruthenium complexes containing polypyridyl ligands. These complexes have been applied for the catalytic reactions, such as CO2 reduction and oxidation of water and organic substrate. In the first, the catalytic activities toward CO2 reduction have been investigated from the viewpoint of electronic and steric properties of the catalysts as well as their nuclearity. In the second, the application of mono- and dinuclear Ru-aqua complexes containing anionic tridentate ligand toward oxidation reaction has been studied. Additionally, a potential reactivity of molybdate dianion, which can be considered as homogeneous model of heterogeneous metal oxide catalysts for CO2 transformation has been studied.
Download or read book Synthesis Reactivity and Catalytic Applications of Two Coordinate First Row Transition Metal Complexes written by Michael Isaac Lipschutz and published by . This book was released on 2015 with total page 139 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recently, the development of more sustainable catalytic systems based on abundant first-row metals, especially nickel, for organic transformations has attracted significant interest. This thesis describes the development of new synthetic methods for the preparation of two-coordinate complexes of a variety of first row transition metals. The physical and spectroscopic properties of these complexes are discussed and the reactivity and catalytic applications of these compounds are also explored. Species of this type are found to catalyze a variety of useful organic transformations using inexpensive metals and ligands.
Download or read book Homogeneous Photocatalysis written by M. Chanon and published by John Wiley & Sons. This book was released on 1997-03-06 with total page 440 pages. Available in PDF, EPUB and Kindle. Book excerpt: Photocatalysis and related processes occupy a strategic position for the future of photochemistry. This volume provides an introduction to basic concepts and explains how applications work at the molecular level.
